1474 Eu-Floridege, Ceramieae, Ceramium. 



J. Ag. Sp. II, p. 143, Echinoceras nudiusculum Kuetz. in Linnaea 

 XV, p. 739, Sp. p. 682, Tab. Phyc. XII, t. 94, f. d-f, J. Ag. 

 Sp. II, p. 146, Echinoceras hamulatum Kuetz. in Botan. Zeit. 

 1847, p. 739, Sp. p. 682, J. Ag. Sp. II, p. 146, Ceramium gigan- 

 teum Menegh. in Giorn. botan. ital. 1844, p. 185, J. Ag. Sp. II, 

 p. 144, Echinoceras giganteum Kuetz. Sp. p. 683, Ceramium 

 uniforme Menegh. in Giorn. botan. ital. 1844, p. 184, J. Ag. Sp. II, 

 p. 143, Echinoceras uniforme Kuetz. Sp. p. 682, Ceramium tu- 

 midulum Menegh. in Giorn. botan. ital. 1844; p. 184, J. Ag. Sp. 

 II, p. 143, Echinoceras tumidulum Kuetz. Sp. p. 683, Ceramium 

 cristatum Menegh. in Giorn. botan. ital. 1844, p. 185, J. Ag. 

 Sp. II, p. 143, Echinoceras cristatum Kuetz. Sp. p. 683, Cera- 

 mium forcipatum Titius mscr., Echinoceras subspinosum Kuetz. 

 in Hohenacker Alg. n. 440, Ceramium robustum J. Ag. Anal. 

 algol. II, p. 35 (formas mediterraneas amplectens). — Fronde 

 subsetacea, regulariter dichotomo-decomposita fastigiata, segmentis 

 patentibus, terminalibus forcipatis incurvis, articulis inferioribus 

 diametro 2-4-plo longioribus, interstitiis pellucidis nudis, genicu- 

 lorum spinulis verticillatis articulatis hyalinis ; tetrasporangiis sim- 

 plici serie circa genicula verticillatis ; cystocarpiis in segmento la- 

 teralibus singulis, ramellis involucrantibus 3-4 cinctis. 



Hab. in mari Mediterraueo et Adriatico, passim, ex. gr. ad littus 

 insulaa Corsicoe (Martens), ad Neapolin (Kuetzing), ad « Genova » 

 (Kuetzing), ad oras Venetiarum, Istriae ac Dalmatiae (Meneghini, 

 ZkNARDiNi, De Toni) ; in mari Aegseo ad oras Asiae Minoris 

 (Fleischer, Kuetzing); etiam in mari Nigro; in oceano Atlan- 

 tico ad littora Europae a Dania et Foerois usque ad Gades et 

 Tingin (Schousboe), nunc ad Canarias et Brasiliam (Martius). 

 Specimina sub nomine Ceramii ciliati ex oceano Pacifico re- 

 portata verisimillime ad Ceramium uncinatum Harv. perti- 

 nent. — Caespites densi, 4-15 cm. longitudine aequantes. Fila 

 nunc crassitiem capillarem parum superantia, nunc setacea, di- 

 chotoma fastigiata, axillis plus minus patentibus. Ramuli proli- 

 feri abbreviati subsecundi segmentis conformes. Segmenta termi- 

 nalia brevissime incurva aut eximie incurvata forcipata. Articuli 

 ramorum principalium diametro 2-4-plo longiores ; genicula corti- 

 cata, zona corticali diametrum fili vix nequante aut superante; in- 

 terstitia pellucida medio nuda, saltein ad apices aliquando strato 

 corticali excurrente tenuissime obducta. Spinuke pellucidoe, arti- 

 culis 3-4 constantes, acutissim;e, articulis infimis majoribus, circa 



